LCD of 77, 57, 21 Calculator

Arrange the Inputs 77,57,21 in a horizontal line separated by commas and divide them with a prime number. Note the quotients in the next row and divide with quotients with prime numbers again. Continue the process until you have all co primes in the last.

As all the numbers left in the last row are co primes you need not do the common division process further.

To obtain the Least Common Denominator, multiply the prime numbers with which you have divided the given numbers and the co primes in the last row i.e. 3 x 7 x 11 x 19 x 1 = 4389

Therefore, LCD of 77,57,21 is 4389

Step1:

Let's calculate the LCD of first two numbers

The formula of LCD is LCD(a,b) = ( a x b) / GCF(a,b)

GCF(77, 57) = 1

LCD(77, 57) = ( 77 x 57 ) / 1

LCD(77, 57) = 4389 / 1

LCD(77, 57) = 4389

Step2:

Here we consider the LCD from the above i.e. 4389 as first number and the next as 21

The formula of LCD is LCD(a,b) = ( a x b) / GCF(a,b)

GCF(4389, 21) = 21

LCD(4389, 21) = ( 4389 x 21 ) / 21

LCD(4389, 21) = 92169 / 21

LCD(4389, 21) = 4389

LCD of 77,57,21 is 4389

Here are some samples of LCD of Numbers calculations.

• LCD of 50, 72, 26
• LCD of 49, 36, 66
• LCD of 18, 69, 91
• LCD of 30, 50, 93
• LCD of 78, 94, 18

1. What is the LCD of 77, 57, 21?

Answer: LCD of 77, 57, 21 is 4389.

2. How to find LCD of 77, 57, 21 on a calculator?

Answer: You can find LCD of 77, 57, 21 by simply giving the inputs in the input field and clicking on the Calculator button next to it to get the concerned Least Common Denominator.

3. How to Find the LCD of 77, 57, 21?

Least Common Denominator of 77, 57, 21.

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors with last row quotient of common division that is LCD(77, 57, 21) = 4389.